docs: add a package Description and a See Also section

[digital-carver]

Now that some space is cleared up in the doc homepage, this PR adds a small description of the package and a "See also" section.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (4e0c352) 90.77% compared to head (94e0d51) 90.77%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #116   +/-   ##
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  Coverage   90.77%   90.77%           
=======================================
  Files           1        1           
  Lines         401      401           
=======================================
  Hits          364      364           
  Misses         37       37           

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